1 /* $OpenBSD: alloc.c,v 1.6 2010/01/01 06:25:37 krw Exp $ */ 2 3 /* Memory allocation... */ 4 5 /* 6 * Copyright (c) 1995, 1996, 1998 The Internet Software Consortium. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of The Internet Software Consortium nor the names 19 * of its contributors may be used to endorse or promote products derived 20 * from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND 23 * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 24 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 26 * DISCLAIMED. IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR 27 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 29 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 30 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 31 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 32 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 33 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * This software has been written for the Internet Software Consortium 37 * by Ted Lemon <mellon@fugue.com> in cooperation with Vixie 38 * Enterprises. To learn more about the Internet Software Consortium, 39 * see ``http://www.vix.com/isc''. To learn more about Vixie 40 * Enterprises, see ``http://www.vix.com''. 41 */ 42 43 #include "dhcpd.h" 44 45 struct lease_state *free_lease_states; 46 47 void * 48 dmalloc(int size, char *name) 49 { 50 void *foo = calloc(size, sizeof(char)); 51 52 if (!foo) 53 warning("No memory for %s.", name); 54 return (foo); 55 } 56 57 void 58 dfree(void *ptr, char *name) 59 { 60 if (!ptr) { 61 warning("dfree %s: free on null pointer.", name); 62 return; 63 } 64 free(ptr); 65 } 66 67 struct tree * 68 new_tree(char *name) 69 { 70 struct tree *rval = dmalloc(sizeof(struct tree), name); 71 72 return (rval); 73 } 74 75 struct tree_cache *free_tree_caches; 76 77 struct tree_cache * 78 new_tree_cache(char *name) 79 { 80 struct tree_cache *rval; 81 82 if (free_tree_caches) { 83 rval = free_tree_caches; 84 free_tree_caches = (struct tree_cache *)(rval->value); 85 } else { 86 rval = dmalloc(sizeof(struct tree_cache), name); 87 if (!rval) 88 error("unable to allocate tree cache for %s.", name); 89 } 90 return (rval); 91 } 92 93 struct hash_table * 94 new_hash_table(int count, char *name) 95 { 96 struct hash_table *rval; 97 98 rval = dmalloc(sizeof(struct hash_table) - 99 (DEFAULT_HASH_SIZE * sizeof(struct hash_bucket *)) + 100 (count * sizeof(struct hash_bucket *)), name); 101 if (rval == NULL) 102 return (NULL); 103 rval->hash_count = count; 104 return (rval); 105 } 106 107 void 108 free_hash_bucket(struct hash_bucket *ptr, char *name) 109 { 110 dfree(ptr, name); 111 } 112 113 void 114 free_tree_cache(struct tree_cache *ptr) 115 { 116 ptr->value = (unsigned char *)free_tree_caches; 117 free_tree_caches = ptr; 118 } 119 120 void 121 free_tree(struct tree *ptr, char *name) 122 { 123 dfree(ptr, name); 124 } 125 126 struct shared_network * 127 new_shared_network(char *name) 128 { 129 struct shared_network *rval = 130 dmalloc(sizeof(struct shared_network), name); 131 return (rval); 132 } 133 134 struct subnet * 135 new_subnet(char *name) 136 { 137 struct subnet *rval = dmalloc(sizeof(struct subnet), name); 138 return (rval); 139 } 140 141 struct lease_state * 142 new_lease_state(char *name) 143 { 144 struct lease_state *rval; 145 146 if (free_lease_states) { 147 rval = free_lease_states; 148 free_lease_states = 149 (struct lease_state *)(free_lease_states->next); 150 } else 151 rval = dmalloc (sizeof (struct lease_state), name); 152 return (rval); 153 } 154 155 void 156 free_lease_state(struct lease_state *ptr, char *name) 157 { 158 if (ptr->prl) 159 dfree(ptr->prl, name); 160 ptr->next = free_lease_states; 161 free_lease_states = ptr; 162 } 163 164 void 165 free_lease(struct lease *ptr, char *name) 166 { 167 dfree(ptr, name); 168 } 169